Abstract: Objective To provide a platform for clinical research of transfusion medicine,we established a national multi-center clinical preoperative anemia database. Methods Based on the Hospital Information System（HIS）of mutle-general hospitals, the data acquisition website was used to collect preoperative anemia related information of surgical patients, and the data was desensitized, aggregated and cleaned with PYTHON 3.6.1 and STATA 15.0. Results A preoperative anemia data collection system and a multi-center clinical preoperative anemia database were established, including massive high-quality data such as demographic information, laboratory examination information, diagnostic information and surgical information. Conclusion Based on data collection system, the multi-center clinical preoperative anemia database with resourceful information, high-quality data and strong operability can be used for clinical research of preoperative anemia.

Key words: Preoperative anemia, Clinical database, Epidemiology, Information sharing